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Questions about my basement sub-floor?

Several questions, Do I have to put a layer of plastic down on the cement floor before I put my sleepers down? Can I attach the sleepers with Liquid nails only,(my basement has never been damp in the past 7 years, my floor has only hairline cracks which I sealed)?If I space my sleepers 24" apart will 3/4" pressed wood be better or Should I use 3/4" plywood?

[This message has been edited by shellchris (edited December 27, 2000).]

This is just my opinion. Personally, I'd stay away from putting a wood floor in the basement. Just because it hasn't been wet in 7 years doesn't mean it'll never get wet. I live in an area that's prone to basement floodings, you may not. The vapor barrier won't hurt a thing but it's not gonna stop a flood. About the sheathing. I prefer a 3/4" fiber board (not particle board)on 16" o.c. sleepers. 24" o.c. makes for a bouncy floor. One other thing, if you go ahead and install and get flooded someday, you'll have to put up with the smell until your insurance company, finally, decides to give up the money, which could take months.

Do use a mechanical fastener with the glue. Don't rely on glue alone. Use 16 o.c.

Put rigid insulation between the sleepers to minimize the echo of footsteps.

Vapor barrier isn't necessary but you can test to see if you need it. Tape a 3' x 3' plastic down - seal all around. Come back in a few days to see if there is any moisture between the floor and the plastic.